HTML5+CSS3小实例:后台管理系统的侧边导航栏

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HTML5+CSS3做一个后台管理系统的侧边导航栏,点击三条杠,可以收起或展开侧边导航栏。收起时,图标变大,文本在图标下方,管理员头像右侧的欢迎语隐藏;展开时图标变小,文本在图标的右侧显示,管理员头像右侧的欢迎语显示。切换过程伴有过渡动画,右侧内容区可以放自己的内容。

效果:

源码:

<!DOCTYPE html>
<html>

<head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no">

    <title>侧边展开导航栏</title>
    <!-- 引入字体图标 -->
    <link rel="stylesheet" href="https://cdn.staticfile.org/font-awesome/4.7.0/css/font-awesome.css">
    <link rel="stylesheet" href="../css/25.css">
</head>

<body>
    <div class="navbar">
        <input type="checkbox" id="checkbox">
        <label for="checkbox">
            <i class="fa fa-bars" aria-hidden="true"></i>
        </label>
        <ul>
            <li>
                <img src="../images/1.png" alt="">
                <span>欢迎您!管理员</span>
            </li>
            <li>
                <a href="javascript:void(0)">
                    <i class="fa fa-home" aria-hidden="true"></i>
                    <span>后台首页</span>
                </a>
            </li>
            <li>
                <a href="javascript:void(0)">
                    <i class="fa fa-sitemap" aria-hidden="true"></i>
                    <span>商品列表</span>
                </a>
            </li>
            <li>
                <a href="javascript:void(0)">
                    <i class="fa fa-user-circle-o" aria-hidden="true"></i>
                    <span>用户列表</span>
                </a>
            </li>
            <li>
                <a href="javascript:void(0)">
                    <i class="fa fa-shopping-bag" aria-hidden="true"></i>
                    <span>订单列表</span>
                </a>
            </li>
            <li>
                <a href="javascript:void(0)">
                    <i class="fa fa-th-large" aria-hidden="true"></i>
                    <span>功能列表</span>
                </a>
            </li>
        </ul>
        <div class="main">
            我是内容区
        </div>
    </div>
</body>

</html>
*{
    /* 初始化 取消内外边距 */
    margin: 0;
    padding: 0;
}
body{
    /* 溢出隐藏 */
    overflow: hidden;
}
.navbar{
    /* 相对定位 */
    position: relative;
    /* 100%窗口宽度 */
    width: 100vw;
    display: flex;
}
.main{
    flex: 1;
    height: calc(100vh - 43px);
    position: relative;
    top: 43px;
    display: flex;
    justify-content: center;
    align-items: center;
}
#checkbox{
    display: none;
}
.navbar label{
    position: absolute;
    top: 0;
    left: 70px;
    width: 100%;
    height: 43px;
    font-size: 30px;
    color: #5a738e;
    background-color: #ededed;
    padding-left: 20px;
    border: 1px solid #d9dee4;
    cursor: pointer;
    /* 加个动画过渡 */
    transition: all 0.5s;
}
.navbar ul{
    list-style: none;
    width: 70px;
    /* 100%窗口高度 */
    height: 100vh;
    background-color: #2a3f54;
    transition: all 0.5s;
    overflow: hidden;
}
.navbar ul li{
    height: 70px;
    margin-bottom: 10px;
}
.navbar ul li:first-child{
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 10px;
}
.navbar ul li:first-child img{
    width: 50px;
    height: 50px;
    border-radius: 50%;
}
.navbar ul li:first-child span{
    /* 先把文字隐藏起来 */
    display: none;
    color: #fff;
    /* 文字禁止换行 */
    white-space: nowrap;
    padding-left: 10px;
}
.navbar ul li a{
    display: flex;
    justify-content: center;
    align-items: center;
    /* 垂直排列 */
    flex-direction: column;
    width: 100%;
    height: 100%;
    color: #d1d1d1;
    text-decoration: none;
}
.navbar ul li a i{
    font-size: 25px;
    margin-bottom: 10px;
}
.navbar ul li a span{
    font-size: 12px;
    white-space: nowrap;
}
.navbar ul li a:hover{
    color: #fff;
    background-color: #35495d;
}
/* :checked选择器是判断复选框是否被选中 */
/* +是相邻兄弟选择器,找到input的下一个兄弟label */
.navbar input:checked + label{
    left: 200px;
}
/* ~也是兄弟选择器,但它可以找到隔了几代的兄弟 */
.navbar input:checked ~ ul{
    width: 200px;
}
.navbar input:checked ~ ul li:first-child{
    /* 将居中改为开头对齐 */
    justify-content: flex-start;
}
.navbar input:checked ~ ul li:first-child span{
    /* 文字显示 */
    display: block;
}
.navbar input:checked ~ ul li a{
    flex-direction: row;
    justify-content: flex-start;
}
.navbar input:checked ~ ul li a i{
    font-size: 18px;
    margin: 0 15px 0 30px;
}
.navbar input:checked ~ ul li a span{
    font-size: 14px;
}